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2 Visual Components Manuals

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4.11.7.3.2.2 Group Number Filter<br />

The Group Number Filter uses the variables 'Filter Control Byte', 'Group Number Filter', and 'Alarm Number<br />

Filter'. Only group entries which are read from the 'Group Number Filter' variable are displayed. If a value of 0 or<br />

an invalid value is read, all alarms are displayed regardless of the group filter or alarm filter.<br />

If one of the valid alarm numbers for this group is in the 'Alarm Number Filter' variable, then alarms are<br />

displayed starting with this alarm. The latest event is displayed if the alarm number is valid but not evaluated by<br />

another Filter Control Byte condition, or if the alarm number is invalid or 0.<br />

4.11.7.3.2.3 Priority Filter<br />

The priority filter uses the 'Filter Control Byte' and 'Priority Filter' variables. Entries are only displayed if they<br />

have the same or higher priority as the variable value in 'Priority Filter'.<br />

4.11.7.3.2.4 Time Filter<br />

The time filter corresponds to the filter entries 'Newer Than' or 'Older Than'. It uses the 'Filter Time' and 'Filter<br />

Control Byte' variables. Entries are only displayed if the time is larger or smaller than the "Filter Time" variable.<br />

A variable with data type USINT array with the length of 6 bytes is to be connected to the time filter. The time<br />

format is entered in this USINT array as follows:<br />

Offset Contents<br />

0 Seconds<br />

1 Minutes<br />

2 Hours<br />

3 Day<br />

4 Month<br />

5 Year<br />

4.11.8 Printing Alarms<br />

<strong>Visual</strong> <strong>Components</strong> provides the possibility to connect an alarm printer to target systems which have parallel<br />

printer interfaces. Alarms are printed if their status is changed and this particular change has been selected to<br />

trigger printing in the configuration.<br />

The following steps should be followed to use an alarm printer:<br />

• Activating the Alarm Printer<br />

• Configuring the Printer<br />

• Configuring Status Texts<br />

• Configuring the Print Format<br />

4.11.8.1 Activating the Alarm Printer<br />

The alarm printer is activated in the global settings of the project (Panel) under the Alarm System group.<br />

4.11.8.2 Configuring the Printer<br />

After 'Use Alarm Printer' has been selected, the 'Printer Settings...' button is used to configure the settings for<br />

the printer.<br />

Clicking on 'Printer Settings...' opens the following dialog box:<br />

Introduction to <strong>Visual</strong> <strong>Components</strong> 2.3<br />

416 4.11.7.3 Filtering the Displayed Alarm

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